Overview
Within the CDISC SDTM data model, Related Records (RELREC) dataset is used to describe relationships between records in two (or more) datasets, such as an Event record and an Intervention record, or a Finding record and an Event record.  The RELREC utility will assist you in creating the related record dataset by automating the transposition of the source data into the RELREC dataset. 

RELREC Options
The RELREC screen allows you to select the source data and related options which is used in creating the related records dataset.  The data flow for this tool is shown here.

Source Data

CDISC Builder RELREC

New or Updated RELREC Dataset

The options available for selecting data and options for RELREC are:

• Source Data - This is the location of the dataset that is going to be used to generating the RELREC related record.
• Datasets - Source datasets that are used to for RELREC.
• Preview - A preview of the first 100 observations of the data that is selected.
• Related Domain - The related domain to CDISC that the dataset is related to.
• Study Identifier - The study name or protocol number that the related record is part of.
• Identification Variables - Variables that can be used to sort the data so that it uniquely identifies each observation of the related record.
• Unique Subject ID Variable - The variable in the source data that corresponds to the Unique Subject ID.
• Output - The libname and dataset name that is being updated or created for the related record.  This is usually named RELREC.
• Base Code - Path and file name containing the SAS program used to generate the related record.
• Save Code - The location of the program that contains the macro call with all the selected parameters used to create the related record.

The RELREC only be applied to one dataset at a time since the options are different among datasets.